Lighting module

Abstract

A lighting module comprises: a light guide plate comprising a top surface and a bottom surface, wherein the light guide plate is configured to emit a first light upward from the top surface and a second light downward from the bottom surface; a first case covering an one side of the light guide plate; a second case covering an other side of the light guide plate; a first light source which is disposed in the first case and is configured to emit light to the one side of the light guide plate; and a second light source which is disposed in the second case and is configured to emit light to the other side of the light guide plate.

What is claimed is: 
     
       1. A lighting module, comprising:
 a light guide plate comprising a top surface and a bottom surface, wherein the light guide plate is configured to emit a first light upward from the top surface and a second light downward from the bottom surface; 
 a first case covering one side of the light guide plate; 
 a second case covering another side of the light guide plate; 
 a first light source which is disposed in the first case and is configured to emit light to the one side of the light guide plate; and 
 a second light source which is disposed in the second case and is configured to emit light to the other side of the light guide plate, 
 wherein the first light passes through a first opening disposed on the top surface of the light guide plate and disposed between the first case and the second case, 
 wherein the second light passes through a second opening disposed under the bottom surface of the light guide plate and disposed between the first case and the second case, and 
 wherein a size of the first opening is different from a size of the second opening. 
 
     
     
       2. The lighting module of  claim 1 , wherein a ratio of a lumen output of the first light to a lumen output of the second light is from 6:4 to 8:2. 
     
     
       3. The lighting module of  claim 1 , wherein an amount of the first light is different from an amount of the second light. 
     
     
       4. The lighting module of  claim 1 , wherein a shape of the first opening and the second opening is a square. 
     
     
       5. The lighting module of  claim 1 , wherein the light guide plate comprises a plurality of the patterns disposed within the light guide plate. 
     
     
       6. The lighting module of  claim 5 , wherein the plurality of the patterns are disposed closer to at least one of the top surface and the bottom surface of the light guide plate. 
     
     
       7. The lighting module of  claim 1 , wherein the light guide plate includes a plurality of patterns disposed on at least one of the top and the bottom surfaces of the light guide plate. 
     
     
       8. The lighting module of  claim 1 , further comprising a first phosphor luminescent film disposed between the light guide plate and the first light source. 
     
     
       9. The lighting module of  claim 1 , wherein the first light source comprises a substrate and a plurality of light emitting devices disposed on the substrate, and wherein a thickness of the light guide plate is less than a thickness of the substrate. 
     
     
       10. The lighting module of  claim 1 ,
 wherein the first case comprises a base on which the first light source is disposed and first and second extension parts which extend from both ends of the base respectively, 
 wherein the first extension part is disposed under the bottom surface of the light guide plate and the second extension part is disposed on the top surface of the light guide plate, and 
 wherein a length of the first extension part is different from a length of the second extension part. 
 
     
     
       11. The lighting module of  claim 1 ,
 wherein the first case comprises a lower case and an upper case, 
 wherein the lower case comprises a first base on which the first light source is disposed, and a first extension part extending from one side edge of the first base in a direction perpendicular to an inner surface of the first base, and 
 wherein the upper case comprises a second base on which the first base of the lower case is disposed, and a second extension part extending from one side edge of the second base in a direction perpendicular to an inner surface of the second base. 
 
     
     
       12. A lighting module, comprising:
 a light guide plate comprising a top surface and a bottom surface, wherein the light guide plate is configured to emit a first light upward from the top surface and a second light downward from the bottom surface; 
 a case covering at least parts of the top surface and the bottom surface of the light guide plate; and 
 a light source which is disposed in the case and is configured to emit light to both sides of the light guide plate, 
 wherein the lighting module is configured to emit the first light upward from the top surface of the light guide plate, and the second light downward from the bottom surface of the light guide plate, and 
 wherein an outside exposure area of the top surface of the light guide plate is different from an outside exposure area of the bottom surface of the light guide plate. 
 
     
     
       13. The lighting module of  claim 12 , wherein a ratio of a lumen output of the first light to a lumen output of the second light is from 6:4 to 8:2. 
     
     
       14. The lighting module of  claim 12 , wherein an amount of the first light is different from an amount of the second light. 
     
     
       15. The lighting module of  claim 12 ,
 wherein the case comprises a base on which the light source is disposed and a first and second extension parts which extend from both ends of the base respectively, 
 wherein the first extension part is disposed under the bottom surface of the light guide plate and the second extension part is disposed on the top surface of the light guide plate, and 
 wherein a length of the first extension part is different from a length of the second extension part. 
 
     
     
       16. The lighting module of  claim 15 , wherein a thickness of the light guide plate is less than an interval between the first extension part and the second extension part. 
     
     
       17. The lighting module of  claim 12 , wherein the light guide plate comprises a plurality of patterns disposed within the light guide plate. 
     
     
       18. The lighting module of  claim 12 , wherein the light guide plate includes a plurality of patterns disposed on at least one of the top and the bottom surfaces of the light guide plate. 
     
     
       19. The lighting module of  claim 12 , further comprising a phosphor luminescent film disposed between the light guide plate and the light source. 
     
     
       20. The lighting module of  claim 12 ,
 wherein the case comprises a lower case and an upper case, 
 wherein the lower case comprises a first base on which the light source is disposed, and a first extension part extending from one side edge of the first base in a direction perpendicular to an inner surface of the first base, and 
 wherein the upper case comprises a second base on which the first base of the lower case is disposed, and a second extension part extending from one side edge of the second base in a direction perpendicular to an inner surface of the second base.